Switch navigation mesh to be based on collision only, not collision and texture meshes

Will need to finetune enemy navigation agent placement depending on if they're now too high/low to sit in the navigation region

Zennysoft.Game.Ma/src/enemy/Enemy.cs

@@ -180,8 +180,7 @@ public abstract partial class Enemy : CharacterBody3D, IEnemy, IProvide<IEnemyLo
   {
     _morphSFX.Play();
     SetPhysicsProcess(false);
-    _enemyLogic.Input(new EnemyLogic.Input.Defeated());
-    Callable.From(QueueFree);
+    Die();
   }
 
   public IDungeonRoom GetCurrentRoom(ImmutableList<IDungeonRoom> roomList)